What is home loan prepayment?
A prepayment is a partial repayment of the outstanding principal, made over and above your regular EMI. RBI banned the prepayment penalty on floating-rate home loans for individual borrowers in 2014, making partial prepayment a powerful (and free) cost-reduction lever for most Indian home borrowers.
Two strategies
After a prepayment, you choose how to apply the savings:
- Keep EMI, shorten tenure — your EMI stays the same; the loan ends earlier. Saves more interest because every subsequent EMI continues at full strength against a smaller balance.
- Reduce EMI, keep tenure — your EMI is recalculated lower for the remaining tenure. Saves less interest but eases monthly cash flow.
For most borrowers, keep-EMI-shorten-tenure is the right answer unless your cash flow is genuinely strained.
How it works (worked example)
Original: ₹50L at 8.5% over 240 months. EMI = ₹43,391. Total interest over 20 years = ₹54.14L.
Year-3 prepayment of ₹5L (at month 36):
- Keep-EMI strategy: new tenure ≈ 196 months. Interest saved ≈ ₹15.5L.
- Reduce-EMI strategy: EMI drops to ~₹39,500; tenure stays 240 months. Interest saved ≈ ₹6.0L.
The keep-EMI choice is 2.6× more efficient.
When prepayment economics are strongest
- Early in the tenure (years 1–8 of a 20-year loan)
- High loan rate (10%+ saves more than 8.5%)
- Floating-rate loan (no penalty for individuals)
- You hold no higher-yielding tax-shielded alternative (e.g., maxed-out 80C, ELSS, NPS)
When not to prepay
- You haven’t built a 6-month emergency fund
- You’re carrying credit-card revolving balance (15%–40% APR — beats this 8.5% loan)
- Your portfolio is dramatically equity-light and you have a long horizon
- You’d lose meaningful tax shield (very high earners maxing Section 24(b))
Tax implications of prepayment
Prepayment reduces your outstanding principal, which in turn reduces the interest component of future EMIs. This is good for your cash flow — but it also means lower Section 24(b) interest deductions in future years. For borrowers in the 30% slab who are currently claiming the full ₹2 lakh Section 24(b) cap, aggressive prepayment can start to erode the tax shield once future annual interest falls below ₹2 lakh.
The post-tax break-even depends on your marginal slab and how much interest you were actually deducting (versus paying above the cap). Use the Income Tax Calculator to model your tax liability before and after the prepayment year, factoring in the lower 24(b) deduction on the post-prepayment schedule. For most borrowers in the 20%+ slab, prepayment still wins on an after-tax basis — but the margin is smaller than the raw interest-saved figure suggests.